Product Description. Our Standard Screw 2ml Aijiren Autosampler 12x32mm vials, We have Clear and Amber vials with or without graduated writing area in available.8-425mm 2ML Vilas and septa. Designed to work in a variety of autosampler requiring narrow neck vials. Our HPLC Vials are manufactured of Clear, Type 1 Class A or Amber, Type 1 Class B